<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="root"></div>
    <script src="../vue3基础源码/vue3.js"></script>
    <script>
        const app = Vue.createApp({
            template:`
                    <input v-model="dataName"/>
                    <div>{{msg}}</div>`,
            setup(props,context){
                const {ref,watchEffect} = Vue;

                let dataName = ref('');

                let msg = ref("");

                const stop = watchEffect(() => {
                    if (dataName.value == '电脑') {
                        msg.value = '戴尔，华硕，英特尔';
                    }else {
                        msg.value = '未知';
                    }
                });
                stop();

                return { dataName, msg }
            }
        });




        const vm = app.mount("#root");
    </script>
</body>
</html>